How birds drop ‘pointless’ genes may also help us perceive evolution
 

People, the most recent tally suggests, have roughly 21,000 genes in our genome, the set of genetic data in an organism. However do we actually want each gene we now have? What if we misplaced three or 4? What if we misplaced 3,000 or 4,000? Might we nonetheless perform? People have variation of their genomes, …

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